I'm happy to take your word for it that Kathy Gori is a genuine person and not a self-publicist. That doesn't of itself answer the question as to whether there is a real relationship between her headaches and earthquakes beyond the fact that between any two sufficiently rich time series there are likely to be many co-inciding events between the two series. I can't speak for Andy Michael having either the time or commitment to follow the subject up, but it never does any harm to ask. Or you could try Alan Jones who has been very generous with his time in the pursuit of such subjects in the past.